As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED MULTIPLE AC POWER INTERRUPTIONS WITH CHIMES IN THE LAVATORIES AND FIRST OFFICER INSTRUMENTS BLINKING. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED LEFT TR-2 AND BUSS CONTROL UNIT. SYSTEM GROUND CHECK NORMAL OPERATION.